Is this landmark checker free?

Yes, completely free with no signup and no usage limits.

Does my data leave my device?

No. All processing runs entirely in your browser. Nothing is sent to any server.

Yes. Works on iPhone Safari and Android Chrome without installing any app.

HTML Landmark Checker

Paste HTML to verify proper use of landmark regions that help screen reader users navigate the page.

100% client-side · no upload

HTML to check

Paste your page HTML or a significant snippet into the text area.
Click Check Landmarks to see which landmark regions were found.
Review warnings for missing required landmarks (main) or unlabelled duplicate landmarks (nav).

Is this landmark checker free?: Yes, completely free with no signup and no usage limits.
Does my data leave my device?: No. All processing runs entirely in your browser. Nothing is sent to any server.
Does it work on mobile?: Yes. Works on iPhone Safari and Android Chrome without installing any app.